@article{GDZPPN002068559,
title = {On planarity of graphs in 3-manifolds.},
journal = {Commentarii mathematici Helvetici},
volume = {67},
year = {1992},
pages = {635-647},
zbl = {0812.57005},
url = {http://dml.mathdoc.fr/item/GDZPPN002068559}
}
Wu, Ying-Qing. On planarity of graphs in 3-manifolds.. Commentarii mathematici Helvetici, Tome 67 (1992) pp. 635-647. http://gdmltest.u-ga.fr/item/GDZPPN002068559/